Ohio Northern University is a private, United Methodist Church-affiliated university located in the United States in Ada, Ohio, founded by Henry Solomon Lehr in 1871. ONU is accredited by The Higher Learning Commission and the North Central Association of Colleges and Schools. ONU is a sister university with Dankook University, a private university in Seoul, South Korea. In 2008, 2009, 2010, and 2013 U.S.